label-maker-dask.ipynb example tutorial fails

The https://github.com/microsoft/PlanetaryComputerExamples/blob/main/tutorials/label-maker-dask.ipynb tutorial fails for me.

When running lmj.execute_job() I get many repetition of the following warning:

distributed.worker - WARNING - Compute Failed
Function:  execute_task
args:      ((<function tile_to_label at 0x7f6dd4e45c10>, Tile(x=15550, y=12548, z=15), 'segmentation', [(<class 'dict'>, [['name', 'Roads'], ['filter', ['has', 'highway']]]), (<class 'dict'>, [['name', 'Buildings'], ['filter', ['has', 'building']]])], '[https://qa-tiles-server-dev.ds.io/services/z17/tiles/{z}/{x}/{y}.pbf](https://qa-tiles-server-dev.ds.io/services/z17/tiles/%7Bz%7D/%7Bx%7D/%7By%7D.pbf)'))
kwargs:    {}
Exception: 'SSLError(MaxRetryError(\'HTTPSConnectionPool(host=\\\'qa-tiles-server-dev.ds.io\\\', port=443): Max retries exceeded with url: /services/z17/tiles/15/15550/12548.pbf (Caused by SSLError(CertificateError("hostname \\\'qa-tiles-server-dev.ds.io\\\' doesn\\\'t match either of \\\'*.azure-api.net\\\', \\\'*.portal.azure-api.net\\\', \\\'*.management.azure-api.net\\\', \\\'*.scm.azure-api.net\\\', \\\'*.configuration.azure-api.net\\\', \\\'*.regional.azure-api.net\\\', \\\'*.developer.azure-api.net\\\', \\\'*.data.azure-api.net\\\'")))\'))'

Followed by an SSL error

---------------------------------------------------------------------------
SSLError                                  Traceback (most recent call last)
Input In [7], in <cell line: 1>()
----> 1 lmj.execute_job()

File /srv/conda/envs/notebook/lib/python3.8/site-packages/label_maker_dask/main.py:108, in LabelMakerJob.execute_job(self)
    106 def execute_job(self):
    107     """compute the labels and images"""
--> 108     self.results = dask.compute(*self.tasks)

File /srv/conda/envs/notebook/lib/python3.8/site-packages/dask/base.py:573, in compute(traverse, optimize_graph, scheduler, get, *args, **kwargs)
    570     keys.append(x.__dask_keys__())
    571     postcomputes.append(x.__dask_postcompute__())
--> 573 results = schedule(dsk, keys, **kwargs)
    574 return repack([f(r, *a) for r, (f, a) in zip(results, postcomputes)])

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/client.py:3010, in Client.get(self, dsk, keys, workers, allow_other_workers, resources, sync, asynchronous, direct, retries, priority, fifo_timeout, actors, **kwargs)
   3008         should_rejoin = False
   3009 try:
-> 3010     results = self.gather(packed, asynchronous=asynchronous, direct=direct)
   3011 finally:
   3012     for f in futures.values():

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/client.py:2162, in Client.gather(self, futures, errors, direct, asynchronous)
   2160 else:
   2161     local_worker = None
-> 2162 return self.sync(
   2163     self._gather,
   2164     futures,
   2165     errors=errors,
   2166     direct=direct,
   2167     local_worker=local_worker,
   2168     asynchronous=asynchronous,
   2169 )

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/utils.py:311, in SyncMethodMixin.sync(self, func, asynchronous, callback_timeout, *args, **kwargs)
    309     return future
    310 else:
--> 311     return sync(
    312         self.loop, func, *args, callback_timeout=callback_timeout, **kwargs
    313     )

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/utils.py:378, in sync(loop, func, callback_timeout, *args, **kwargs)
    376 if error:
    377     typ, exc, tb = error
--> 378     raise exc.with_traceback(tb)
    379 else:
    380     return result

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/utils.py:351, in sync.<locals>.f()
    349         future = asyncio.wait_for(future, callback_timeout)
    350     future = asyncio.ensure_future(future)
--> 351     result = yield future
    352 except Exception:
    353     error = sys.exc_info()

File /srv/conda/envs/notebook/lib/python3.8/site-packages/tornado/gen.py:762, in Runner.run(self)
    759 exc_info = None
    761 try:
--> 762     value = future.result()
    763 except Exception:
    764     exc_info = sys.exc_info()

File /srv/conda/envs/notebook/lib/python3.8/site-packages/distributed/client.py:2025, in Client._gather(self, futures, errors, direct, local_worker)
   2023         exc = CancelledError(key)
   2024     else:
-> 2025         raise exception.with_traceback(traceback)
   2026     raise exc
   2027 if errors == "skip":

File /srv/conda/envs/notebook/lib/python3.8/site-packages/label_maker_dask/main.py:38, in tile_to_label()
     22 """
     23 Parameters
     24 ------------
   (...)
     34     representing the label of the tile
     35 """
     37 url = label_source.format(x=tile.x, y=tile.y, z=tile.z)
---> 38 r = requests.get(url)
     39 r.raise_for_status()
     41 tile_data = mapbox_vector_tile.decode(r.content)

File /srv/conda/envs/notebook/lib/python3.8/site-packages/requests/api.py:75, in get()
     64 def get(url, params=None, **kwargs):
     65     r"""Sends a GET request.
     66 
     67     :param url: URL for the new :class:`Request` object.
   (...)
     72     :rtype: requests.Response
     73     """
---> 75     return request('get', url, params=params, **kwargs)

File /srv/conda/envs/notebook/lib/python3.8/site-packages/requests/api.py:61, in request()
     57 # By using the 'with' statement we are sure the session is closed, thus we
     58 # avoid leaving sockets open which can trigger a ResourceWarning in some
     59 # cases, and look like a memory leak in others.
     60 with sessions.Session() as session:
---> 61     return session.request(method=method, url=url, **kwargs)

File /srv/conda/envs/notebook/lib/python3.8/site-packages/requests/sessions.py:529, in request()
    524 send_kwargs = {
    525     'timeout': timeout,
    526     'allow_redirects': allow_redirects,
    527 }
    528 send_kwargs.update(settings)
--> 529 resp = self.send(prep, **send_kwargs)
    531 return resp

File /srv/conda/envs/notebook/lib/python3.8/site-packages/requests/sessions.py:645, in send()
    642 start = preferred_clock()
    644 # Send the request
--> 645 r = adapter.send(request, **kwargs)
    647 # Total elapsed time of the request (approximately)
    648 elapsed = preferred_clock() - start

File /srv/conda/envs/notebook/lib/python3.8/site-packages/requests/adapters.py:517, in send()
    513         raise ProxyError(e, request=request)
    515     if isinstance(e.reason, _SSLError):
    516         # This branch is for urllib3 v1.22 and later.
--> 517         raise SSLError(e, request=request)
    519     raise ConnectionError(e, request=request)
    521 except ClosedPoolError as e:

SSLError: None: Max retries exceeded with url: /services/z17/tiles/15/15550/12548.pbf (Caused by None)

Looks like the label_source does not work as suggested in the notebook.

• label_source: str. A template string for a tile server providing OpenStreetMap QA tiles. Planetary Computer hosts a tile server supporting this format at https://qa-tiles-server-dev.ds.io/services/z17/tiles/{z}/{x}/{y}.pbf

Open tutorials/label-maker-dask.ipynb and inspect the label_source value used by lmj.execute_job(). First reproduce the failure and verify whether the referenced tile-server endpoint and certificate are still valid. Done means the tutorial's label_source points to a working endpoint and the notebook completes the labeling job without the reported SSL error.